2 * Copyright (c) 2011 Atmel Corporation
3 * Josh Wu, <josh.wu@atmel.com>
5 * Based on previous work by Lars Haring, <lars.haring@atmel.com>
7 * Based on the bttv driver for Bt848 with respective copyright holders
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/clk.h>
15 #include <linux/completion.h>
16 #include <linux/delay.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
25 #include <media/atmel-isi.h>
26 #include <media/soc_camera.h>
27 #include <media/soc_mediabus.h>
28 #include <media/videobuf2-dma-contig.h>
30 #define MAX_BUFFER_NUM 32
31 #define MAX_SUPPORT_WIDTH 2048
32 #define MAX_SUPPORT_HEIGHT 2048
33 #define VID_LIMIT_BYTES (16 * 1024 * 1024)
34 #define MIN_FRAME_RATE 15
35 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
44 /* Frame buffer descriptor */
46 /* Physical address of the frame buffer */
48 /* DMA Control Register(only in HISI2) */
50 /* Physical address of the next fbd */
54 static void set_dma_ctrl(struct fbd
*fb_desc
, u32 ctrl
)
56 fb_desc
->dma_ctrl
= ctrl
;
60 struct list_head list
;
65 /* Frame buffer data */
68 struct isi_dma_desc
*p_dma_desc
;
69 struct list_head list
;
73 /* Protects the access of variables shared with the ISR */
78 /* State of the ISI module in capturing mode */
81 /* Wait queue for waiting for SOF */
82 wait_queue_head_t vsync_wq
;
84 struct vb2_alloc_ctx
*alloc_ctx
;
86 /* Allocate descriptors for dma buffer use */
87 struct fbd
*p_fb_descriptors
;
88 u32 fb_descriptors_phys
;
89 struct list_head dma_desc_head
;
90 struct isi_dma_desc dma_desc
[MAX_BUFFER_NUM
];
92 struct completion complete
;
93 /* ISI peripherial clock */
95 /* ISI_MCK, feed to camera sensor to generate pixel clock */
99 struct isi_platform_data
*pdata
;
100 u16 width_flags
; /* max 12 bits */
102 struct list_head video_buffer_list
;
103 struct frame_buffer
*active
;
105 struct soc_camera_host soc_host
;
108 static void isi_writel(struct atmel_isi
*isi
, u32 reg
, u32 val
)
110 writel(val
, isi
->regs
+ reg
);
112 static u32
isi_readl(struct atmel_isi
*isi
, u32 reg
)
114 return readl(isi
->regs
+ reg
);
117 static int configure_geometry(struct atmel_isi
*isi
, u32 width
,
118 u32 height
, enum v4l2_mbus_pixelcode code
)
123 /* YUV, including grey */
124 case V4L2_MBUS_FMT_Y8_1X8
:
125 cr
= ISI_CFG2_GRAYSCALE
;
127 case V4L2_MBUS_FMT_UYVY8_2X8
:
128 cr
= ISI_CFG2_YCC_SWAP_MODE_3
;
130 case V4L2_MBUS_FMT_VYUY8_2X8
:
131 cr
= ISI_CFG2_YCC_SWAP_MODE_2
;
133 case V4L2_MBUS_FMT_YUYV8_2X8
:
134 cr
= ISI_CFG2_YCC_SWAP_MODE_1
;
136 case V4L2_MBUS_FMT_YVYU8_2X8
:
137 cr
= ISI_CFG2_YCC_SWAP_DEFAULT
;
144 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
146 cfg2
= isi_readl(isi
, ISI_CFG2
);
149 cfg2
&= ~(ISI_CFG2_IM_HSIZE_MASK
);
150 cfg2
|= ((width
- 1) << ISI_CFG2_IM_HSIZE_OFFSET
) &
151 ISI_CFG2_IM_HSIZE_MASK
;
153 cfg2
&= ~(ISI_CFG2_IM_VSIZE_MASK
);
154 cfg2
|= ((height
- 1) << ISI_CFG2_IM_VSIZE_OFFSET
)
155 & ISI_CFG2_IM_VSIZE_MASK
;
156 isi_writel(isi
, ISI_CFG2
, cfg2
);
161 static irqreturn_t
atmel_isi_handle_streaming(struct atmel_isi
*isi
)
164 struct vb2_buffer
*vb
= &isi
->active
->vb
;
165 struct frame_buffer
*buf
= isi
->active
;
167 list_del_init(&buf
->list
);
168 v4l2_get_timestamp(&vb
->v4l2_buf
.timestamp
);
169 vb
->v4l2_buf
.sequence
= isi
->sequence
++;
170 vb2_buffer_done(vb
, VB2_BUF_STATE_DONE
);
173 if (list_empty(&isi
->video_buffer_list
)) {
176 /* start next dma frame. */
177 isi
->active
= list_entry(isi
->video_buffer_list
.next
,
178 struct frame_buffer
, list
);
179 isi_writel(isi
, ISI_DMA_C_DSCR
,
180 isi
->active
->p_dma_desc
->fbd_phys
);
181 isi_writel(isi
, ISI_DMA_C_CTRL
,
182 ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
183 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
188 /* ISI interrupt service routine */
189 static irqreturn_t
isi_interrupt(int irq
, void *dev_id
)
191 struct atmel_isi
*isi
= dev_id
;
192 u32 status
, mask
, pending
;
193 irqreturn_t ret
= IRQ_NONE
;
195 spin_lock(&isi
->lock
);
197 status
= isi_readl(isi
, ISI_STATUS
);
198 mask
= isi_readl(isi
, ISI_INTMASK
);
199 pending
= status
& mask
;
201 if (pending
& ISI_CTRL_SRST
) {
202 complete(&isi
->complete
);
203 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_SRST
);
205 } else if (pending
& ISI_CTRL_DIS
) {
206 complete(&isi
->complete
);
207 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_DIS
);
210 if ((pending
& ISI_SR_VSYNC
) &&
211 (isi
->state
== ISI_STATE_IDLE
)) {
212 isi
->state
= ISI_STATE_READY
;
213 wake_up_interruptible(&isi
->vsync_wq
);
216 if (likely(pending
& ISI_SR_CXFR_DONE
))
217 ret
= atmel_isi_handle_streaming(isi
);
220 spin_unlock(&isi
->lock
);
224 #define WAIT_ISI_RESET 1
225 #define WAIT_ISI_DISABLE 0
226 static int atmel_isi_wait_status(struct atmel_isi
*isi
, int wait_reset
)
228 unsigned long timeout
;
230 * The reset or disable will only succeed if we have a
231 * pixel clock from the camera.
233 init_completion(&isi
->complete
);
236 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_SRST
);
237 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_SRST
);
239 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_DIS
);
240 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
243 timeout
= wait_for_completion_timeout(&isi
->complete
,
244 msecs_to_jiffies(100));
251 /* ------------------------------------------------------------------
253 ------------------------------------------------------------------*/
254 static int queue_setup(struct vb2_queue
*vq
, const struct v4l2_format
*fmt
,
255 unsigned int *nbuffers
, unsigned int *nplanes
,
256 unsigned int sizes
[], void *alloc_ctxs
[])
258 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
259 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
260 struct atmel_isi
*isi
= ici
->priv
;
265 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_RESET
);
267 dev_err(icd
->parent
, "Reset ISI timed out\n");
270 /* Disable all interrupts */
271 isi_writel(isi
, ISI_INTDIS
, ~0UL);
273 size
= icd
->sizeimage
;
275 if (!*nbuffers
|| *nbuffers
> MAX_BUFFER_NUM
)
276 *nbuffers
= MAX_BUFFER_NUM
;
278 if (size
* *nbuffers
> VID_LIMIT_BYTES
)
279 *nbuffers
= VID_LIMIT_BYTES
/ size
;
283 alloc_ctxs
[0] = isi
->alloc_ctx
;
288 dev_dbg(icd
->parent
, "%s, count=%d, size=%ld\n", __func__
,
294 static int buffer_init(struct vb2_buffer
*vb
)
296 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
298 buf
->p_dma_desc
= NULL
;
299 INIT_LIST_HEAD(&buf
->list
);
304 static int buffer_prepare(struct vb2_buffer
*vb
)
306 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
307 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
308 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
309 struct atmel_isi
*isi
= ici
->priv
;
311 struct isi_dma_desc
*desc
;
313 size
= icd
->sizeimage
;
315 if (vb2_plane_size(vb
, 0) < size
) {
316 dev_err(icd
->parent
, "%s data will not fit into plane (%lu < %lu)\n",
317 __func__
, vb2_plane_size(vb
, 0), size
);
321 vb2_set_plane_payload(&buf
->vb
, 0, size
);
323 if (!buf
->p_dma_desc
) {
324 if (list_empty(&isi
->dma_desc_head
)) {
325 dev_err(icd
->parent
, "Not enough dma descriptors.\n");
328 /* Get an available descriptor */
329 desc
= list_entry(isi
->dma_desc_head
.next
,
330 struct isi_dma_desc
, list
);
331 /* Delete the descriptor since now it is used */
332 list_del_init(&desc
->list
);
334 /* Initialize the dma descriptor */
335 desc
->p_fbd
->fb_address
=
336 vb2_dma_contig_plane_dma_addr(vb
, 0);
337 desc
->p_fbd
->next_fbd_address
= 0;
338 set_dma_ctrl(desc
->p_fbd
, ISI_DMA_CTRL_WB
);
340 buf
->p_dma_desc
= desc
;
346 static void buffer_cleanup(struct vb2_buffer
*vb
)
348 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
349 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
350 struct atmel_isi
*isi
= ici
->priv
;
351 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
353 /* This descriptor is available now and we add to head list */
355 list_add(&buf
->p_dma_desc
->list
, &isi
->dma_desc_head
);
358 static void start_dma(struct atmel_isi
*isi
, struct frame_buffer
*buffer
)
362 cfg1
= isi_readl(isi
, ISI_CFG1
);
363 /* Enable irq: cxfr for the codec path, pxfr for the preview path */
364 isi_writel(isi
, ISI_INTEN
,
365 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
367 /* Check if already in a frame */
368 if (isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) {
369 dev_err(isi
->soc_host
.icd
->parent
, "Already in frame handling.\n");
373 isi_writel(isi
, ISI_DMA_C_DSCR
, buffer
->p_dma_desc
->fbd_phys
);
374 isi_writel(isi
, ISI_DMA_C_CTRL
, ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
375 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
377 /* Enable linked list */
378 cfg1
|= isi
->pdata
->frate
| ISI_CFG1_DISCR
;
380 /* Enable codec path and ISI */
381 ctrl
= ISI_CTRL_CDC
| ISI_CTRL_EN
;
382 isi_writel(isi
, ISI_CTRL
, ctrl
);
383 isi_writel(isi
, ISI_CFG1
, cfg1
);
386 static void buffer_queue(struct vb2_buffer
*vb
)
388 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
389 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
390 struct atmel_isi
*isi
= ici
->priv
;
391 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
392 unsigned long flags
= 0;
394 spin_lock_irqsave(&isi
->lock
, flags
);
395 list_add_tail(&buf
->list
, &isi
->video_buffer_list
);
397 if (isi
->active
== NULL
) {
399 if (vb2_is_streaming(vb
->vb2_queue
))
402 spin_unlock_irqrestore(&isi
->lock
, flags
);
405 static int start_streaming(struct vb2_queue
*vq
, unsigned int count
)
407 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
408 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
409 struct atmel_isi
*isi
= ici
->priv
;
414 spin_lock_irq(&isi
->lock
);
415 isi
->state
= ISI_STATE_IDLE
;
416 /* Clear any pending SOF interrupt */
417 sr
= isi_readl(isi
, ISI_STATUS
);
418 /* Enable VSYNC interrupt for SOF */
419 isi_writel(isi
, ISI_INTEN
, ISI_SR_VSYNC
);
420 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_EN
);
421 spin_unlock_irq(&isi
->lock
);
423 dev_dbg(icd
->parent
, "Waiting for SOF\n");
424 ret
= wait_event_interruptible(isi
->vsync_wq
,
425 isi
->state
!= ISI_STATE_IDLE
);
429 if (isi
->state
!= ISI_STATE_READY
) {
434 spin_lock_irq(&isi
->lock
);
435 isi
->state
= ISI_STATE_WAIT_SOF
;
436 isi_writel(isi
, ISI_INTDIS
, ISI_SR_VSYNC
);
438 start_dma(isi
, isi
->active
);
439 spin_unlock_irq(&isi
->lock
);
445 INIT_LIST_HEAD(&isi
->video_buffer_list
);
449 /* abort streaming and wait for last buffer */
450 static int stop_streaming(struct vb2_queue
*vq
)
452 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
453 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
454 struct atmel_isi
*isi
= ici
->priv
;
455 struct frame_buffer
*buf
, *node
;
457 unsigned long timeout
;
459 spin_lock_irq(&isi
->lock
);
461 /* Release all active buffers */
462 list_for_each_entry_safe(buf
, node
, &isi
->video_buffer_list
, list
) {
463 list_del_init(&buf
->list
);
464 vb2_buffer_done(&buf
->vb
, VB2_BUF_STATE_ERROR
);
466 spin_unlock_irq(&isi
->lock
);
468 timeout
= jiffies
+ FRAME_INTERVAL_MILLI_SEC
* HZ
;
469 /* Wait until the end of the current frame. */
470 while ((isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) &&
471 time_before(jiffies
, timeout
))
474 if (time_after(jiffies
, timeout
)) {
476 "Timeout waiting for finishing codec request\n");
480 /* Disable interrupts */
481 isi_writel(isi
, ISI_INTDIS
,
482 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
484 /* Disable ISI and wait for it is done */
485 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_DISABLE
);
487 dev_err(icd
->parent
, "Disable ISI timed out\n");
492 static struct vb2_ops isi_video_qops
= {
493 .queue_setup
= queue_setup
,
494 .buf_init
= buffer_init
,
495 .buf_prepare
= buffer_prepare
,
496 .buf_cleanup
= buffer_cleanup
,
497 .buf_queue
= buffer_queue
,
498 .start_streaming
= start_streaming
,
499 .stop_streaming
= stop_streaming
,
500 .wait_prepare
= soc_camera_unlock
,
501 .wait_finish
= soc_camera_lock
,
504 /* ------------------------------------------------------------------
505 SOC camera operations for the device
506 ------------------------------------------------------------------*/
507 static int isi_camera_init_videobuf(struct vb2_queue
*q
,
508 struct soc_camera_device
*icd
)
510 q
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
511 q
->io_modes
= VB2_MMAP
;
513 q
->buf_struct_size
= sizeof(struct frame_buffer
);
514 q
->ops
= &isi_video_qops
;
515 q
->mem_ops
= &vb2_dma_contig_memops
;
516 q
->timestamp_type
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
518 return vb2_queue_init(q
);
521 static int isi_camera_set_fmt(struct soc_camera_device
*icd
,
522 struct v4l2_format
*f
)
524 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
525 struct atmel_isi
*isi
= ici
->priv
;
526 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
527 const struct soc_camera_format_xlate
*xlate
;
528 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
529 struct v4l2_mbus_framefmt mf
;
532 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
534 dev_warn(icd
->parent
, "Format %x not found\n",
539 dev_dbg(icd
->parent
, "Plan to set format %dx%d\n",
540 pix
->width
, pix
->height
);
542 mf
.width
= pix
->width
;
543 mf
.height
= pix
->height
;
544 mf
.field
= pix
->field
;
545 mf
.colorspace
= pix
->colorspace
;
546 mf
.code
= xlate
->code
;
548 ret
= v4l2_subdev_call(sd
, video
, s_mbus_fmt
, &mf
);
552 if (mf
.code
!= xlate
->code
)
555 ret
= configure_geometry(isi
, pix
->width
, pix
->height
, xlate
->code
);
559 pix
->width
= mf
.width
;
560 pix
->height
= mf
.height
;
561 pix
->field
= mf
.field
;
562 pix
->colorspace
= mf
.colorspace
;
563 icd
->current_fmt
= xlate
;
565 dev_dbg(icd
->parent
, "Finally set format %dx%d\n",
566 pix
->width
, pix
->height
);
571 static int isi_camera_try_fmt(struct soc_camera_device
*icd
,
572 struct v4l2_format
*f
)
574 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
575 const struct soc_camera_format_xlate
*xlate
;
576 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
577 struct v4l2_mbus_framefmt mf
;
578 u32 pixfmt
= pix
->pixelformat
;
581 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
582 if (pixfmt
&& !xlate
) {
583 dev_warn(icd
->parent
, "Format %x not found\n", pixfmt
);
587 /* limit to Atmel ISI hardware capabilities */
588 if (pix
->height
> MAX_SUPPORT_HEIGHT
)
589 pix
->height
= MAX_SUPPORT_HEIGHT
;
590 if (pix
->width
> MAX_SUPPORT_WIDTH
)
591 pix
->width
= MAX_SUPPORT_WIDTH
;
593 /* limit to sensor capabilities */
594 mf
.width
= pix
->width
;
595 mf
.height
= pix
->height
;
596 mf
.field
= pix
->field
;
597 mf
.colorspace
= pix
->colorspace
;
598 mf
.code
= xlate
->code
;
600 ret
= v4l2_subdev_call(sd
, video
, try_mbus_fmt
, &mf
);
604 pix
->width
= mf
.width
;
605 pix
->height
= mf
.height
;
606 pix
->colorspace
= mf
.colorspace
;
610 pix
->field
= V4L2_FIELD_NONE
;
612 case V4L2_FIELD_NONE
:
615 dev_err(icd
->parent
, "Field type %d unsupported.\n",
623 static const struct soc_mbus_pixelfmt isi_camera_formats
[] = {
625 .fourcc
= V4L2_PIX_FMT_YUYV
,
626 .name
= "Packed YUV422 16 bit",
627 .bits_per_sample
= 8,
628 .packing
= SOC_MBUS_PACKING_2X8_PADHI
,
629 .order
= SOC_MBUS_ORDER_LE
,
630 .layout
= SOC_MBUS_LAYOUT_PACKED
,
634 /* This will be corrected as we get more formats */
635 static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt
*fmt
)
637 return fmt
->packing
== SOC_MBUS_PACKING_NONE
||
638 (fmt
->bits_per_sample
== 8 &&
639 fmt
->packing
== SOC_MBUS_PACKING_2X8_PADHI
) ||
640 (fmt
->bits_per_sample
> 8 &&
641 fmt
->packing
== SOC_MBUS_PACKING_EXTEND16
);
644 #define ISI_BUS_PARAM (V4L2_MBUS_MASTER | \
645 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
646 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
647 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
648 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
649 V4L2_MBUS_PCLK_SAMPLE_RISING | \
650 V4L2_MBUS_PCLK_SAMPLE_FALLING | \
651 V4L2_MBUS_DATA_ACTIVE_HIGH)
653 static int isi_camera_try_bus_param(struct soc_camera_device
*icd
,
654 unsigned char buswidth
)
656 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
657 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
658 struct atmel_isi
*isi
= ici
->priv
;
659 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
660 unsigned long common_flags
;
663 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
665 common_flags
= soc_mbus_config_compatible(&cfg
,
668 dev_warn(icd
->parent
,
669 "Flags incompatible: camera 0x%x, host 0x%x\n",
670 cfg
.flags
, ISI_BUS_PARAM
);
673 } else if (ret
!= -ENOIOCTLCMD
) {
677 if ((1 << (buswidth
- 1)) & isi
->width_flags
)
683 static int isi_camera_get_formats(struct soc_camera_device
*icd
,
685 struct soc_camera_format_xlate
*xlate
)
687 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
688 int formats
= 0, ret
;
690 enum v4l2_mbus_pixelcode code
;
691 /* soc camera host format */
692 const struct soc_mbus_pixelfmt
*fmt
;
694 ret
= v4l2_subdev_call(sd
, video
, enum_mbus_fmt
, idx
, &code
);
696 /* No more formats */
699 fmt
= soc_mbus_get_fmtdesc(code
);
702 "Invalid format code #%u: %d\n", idx
, code
);
706 /* This also checks support for the requested bits-per-sample */
707 ret
= isi_camera_try_bus_param(icd
, fmt
->bits_per_sample
);
710 "Fail to try the bus parameters.\n");
715 case V4L2_MBUS_FMT_UYVY8_2X8
:
716 case V4L2_MBUS_FMT_VYUY8_2X8
:
717 case V4L2_MBUS_FMT_YUYV8_2X8
:
718 case V4L2_MBUS_FMT_YVYU8_2X8
:
721 xlate
->host_fmt
= &isi_camera_formats
[0];
724 dev_dbg(icd
->parent
, "Providing format %s using code %d\n",
725 isi_camera_formats
[0].name
, code
);
729 if (!isi_camera_packing_supported(fmt
))
733 "Providing format %s in pass-through mode\n",
737 /* Generic pass-through */
740 xlate
->host_fmt
= fmt
;
748 static int isi_camera_add_device(struct soc_camera_device
*icd
)
750 dev_dbg(icd
->parent
, "Atmel ISI Camera driver attached to camera %d\n",
756 static void isi_camera_remove_device(struct soc_camera_device
*icd
)
758 dev_dbg(icd
->parent
, "Atmel ISI Camera driver detached from camera %d\n",
762 /* Called with .host_lock held */
763 static int isi_camera_clock_start(struct soc_camera_host
*ici
)
765 struct atmel_isi
*isi
= ici
->priv
;
768 ret
= clk_enable(isi
->pclk
);
772 ret
= clk_enable(isi
->mck
);
774 clk_disable(isi
->pclk
);
781 /* Called with .host_lock held */
782 static void isi_camera_clock_stop(struct soc_camera_host
*ici
)
784 struct atmel_isi
*isi
= ici
->priv
;
786 clk_disable(isi
->mck
);
787 clk_disable(isi
->pclk
);
790 static unsigned int isi_camera_poll(struct file
*file
, poll_table
*pt
)
792 struct soc_camera_device
*icd
= file
->private_data
;
794 return vb2_poll(&icd
->vb2_vidq
, file
, pt
);
797 static int isi_camera_querycap(struct soc_camera_host
*ici
,
798 struct v4l2_capability
*cap
)
800 strcpy(cap
->driver
, "atmel-isi");
801 strcpy(cap
->card
, "Atmel Image Sensor Interface");
802 cap
->capabilities
= (V4L2_CAP_VIDEO_CAPTURE
|
807 static int isi_camera_set_bus_param(struct soc_camera_device
*icd
)
809 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
810 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
811 struct atmel_isi
*isi
= ici
->priv
;
812 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
813 unsigned long common_flags
;
817 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
819 common_flags
= soc_mbus_config_compatible(&cfg
,
822 dev_warn(icd
->parent
,
823 "Flags incompatible: camera 0x%x, host 0x%x\n",
824 cfg
.flags
, ISI_BUS_PARAM
);
827 } else if (ret
!= -ENOIOCTLCMD
) {
830 common_flags
= ISI_BUS_PARAM
;
832 dev_dbg(icd
->parent
, "Flags cam: 0x%x host: 0x%x common: 0x%lx\n",
833 cfg
.flags
, ISI_BUS_PARAM
, common_flags
);
835 /* Make choises, based on platform preferences */
836 if ((common_flags
& V4L2_MBUS_HSYNC_ACTIVE_HIGH
) &&
837 (common_flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
)) {
838 if (isi
->pdata
->hsync_act_low
)
839 common_flags
&= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH
;
841 common_flags
&= ~V4L2_MBUS_HSYNC_ACTIVE_LOW
;
844 if ((common_flags
& V4L2_MBUS_VSYNC_ACTIVE_HIGH
) &&
845 (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)) {
846 if (isi
->pdata
->vsync_act_low
)
847 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH
;
849 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_LOW
;
852 if ((common_flags
& V4L2_MBUS_PCLK_SAMPLE_RISING
) &&
853 (common_flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)) {
854 if (isi
->pdata
->pclk_act_falling
)
855 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_RISING
;
857 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_FALLING
;
860 cfg
.flags
= common_flags
;
861 ret
= v4l2_subdev_call(sd
, video
, s_mbus_config
, &cfg
);
862 if (ret
< 0 && ret
!= -ENOIOCTLCMD
) {
863 dev_dbg(icd
->parent
, "camera s_mbus_config(0x%lx) returned %d\n",
868 /* set bus param for ISI */
869 if (common_flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
)
870 cfg1
|= ISI_CFG1_HSYNC_POL_ACTIVE_LOW
;
871 if (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)
872 cfg1
|= ISI_CFG1_VSYNC_POL_ACTIVE_LOW
;
873 if (common_flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)
874 cfg1
|= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING
;
876 if (isi
->pdata
->has_emb_sync
)
877 cfg1
|= ISI_CFG1_EMB_SYNC
;
878 if (isi
->pdata
->full_mode
)
879 cfg1
|= ISI_CFG1_FULL_MODE
;
881 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
882 isi_writel(isi
, ISI_CFG1
, cfg1
);
887 static struct soc_camera_host_ops isi_soc_camera_host_ops
= {
888 .owner
= THIS_MODULE
,
889 .add
= isi_camera_add_device
,
890 .remove
= isi_camera_remove_device
,
891 .clock_start
= isi_camera_clock_start
,
892 .clock_stop
= isi_camera_clock_stop
,
893 .set_fmt
= isi_camera_set_fmt
,
894 .try_fmt
= isi_camera_try_fmt
,
895 .get_formats
= isi_camera_get_formats
,
896 .init_videobuf2
= isi_camera_init_videobuf
,
897 .poll
= isi_camera_poll
,
898 .querycap
= isi_camera_querycap
,
899 .set_bus_param
= isi_camera_set_bus_param
,
902 /* -----------------------------------------------------------------------*/
903 static int atmel_isi_remove(struct platform_device
*pdev
)
905 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
906 struct atmel_isi
*isi
= container_of(soc_host
,
907 struct atmel_isi
, soc_host
);
909 free_irq(isi
->irq
, isi
);
910 soc_camera_host_unregister(soc_host
);
911 vb2_dma_contig_cleanup_ctx(isi
->alloc_ctx
);
912 dma_free_coherent(&pdev
->dev
,
913 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
914 isi
->p_fb_descriptors
,
915 isi
->fb_descriptors_phys
);
918 clk_unprepare(isi
->mck
);
920 clk_unprepare(isi
->pclk
);
927 static int atmel_isi_probe(struct platform_device
*pdev
)
930 struct atmel_isi
*isi
;
932 struct resource
*regs
;
934 struct device
*dev
= &pdev
->dev
;
935 struct soc_camera_host
*soc_host
;
936 struct isi_platform_data
*pdata
;
938 pdata
= dev
->platform_data
;
939 if (!pdata
|| !pdata
->data_width_flags
|| !pdata
->mck_hz
) {
941 "No config available for Atmel ISI\n");
945 regs
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
949 pclk
= clk_get(&pdev
->dev
, "isi_clk");
951 return PTR_ERR(pclk
);
953 ret
= clk_prepare(pclk
);
955 goto err_clk_prepare_pclk
;
957 isi
= kzalloc(sizeof(struct atmel_isi
), GFP_KERNEL
);
960 dev_err(&pdev
->dev
, "Can't allocate interface!\n");
967 spin_lock_init(&isi
->lock
);
968 init_waitqueue_head(&isi
->vsync_wq
);
969 INIT_LIST_HEAD(&isi
->video_buffer_list
);
970 INIT_LIST_HEAD(&isi
->dma_desc_head
);
972 /* Get ISI_MCK, provided by programmable clock or external clock */
973 isi
->mck
= clk_get(dev
, "isi_mck");
974 if (IS_ERR(isi
->mck
)) {
975 dev_err(dev
, "Failed to get isi_mck\n");
976 ret
= PTR_ERR(isi
->mck
);
980 ret
= clk_prepare(isi
->mck
);
982 goto err_clk_prepare_mck
;
984 /* Set ISI_MCK's frequency, it should be faster than pixel clock */
985 ret
= clk_set_rate(isi
->mck
, pdata
->mck_hz
);
987 goto err_set_mck_rate
;
989 isi
->p_fb_descriptors
= dma_alloc_coherent(&pdev
->dev
,
990 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
991 &isi
->fb_descriptors_phys
,
993 if (!isi
->p_fb_descriptors
) {
995 dev_err(&pdev
->dev
, "Can't allocate descriptors!\n");
996 goto err_alloc_descriptors
;
999 for (i
= 0; i
< MAX_BUFFER_NUM
; i
++) {
1000 isi
->dma_desc
[i
].p_fbd
= isi
->p_fb_descriptors
+ i
;
1001 isi
->dma_desc
[i
].fbd_phys
= isi
->fb_descriptors_phys
+
1002 i
* sizeof(struct fbd
);
1003 list_add(&isi
->dma_desc
[i
].list
, &isi
->dma_desc_head
);
1006 isi
->alloc_ctx
= vb2_dma_contig_init_ctx(&pdev
->dev
);
1007 if (IS_ERR(isi
->alloc_ctx
)) {
1008 ret
= PTR_ERR(isi
->alloc_ctx
);
1012 isi
->regs
= ioremap(regs
->start
, resource_size(regs
));
1018 if (pdata
->data_width_flags
& ISI_DATAWIDTH_8
)
1019 isi
->width_flags
= 1 << 7;
1020 if (pdata
->data_width_flags
& ISI_DATAWIDTH_10
)
1021 isi
->width_flags
|= 1 << 9;
1023 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
1025 irq
= platform_get_irq(pdev
, 0);
1026 if (IS_ERR_VALUE(irq
)) {
1031 ret
= request_irq(irq
, isi_interrupt
, 0, "isi", isi
);
1033 dev_err(&pdev
->dev
, "Unable to request irq %d\n", irq
);
1038 soc_host
= &isi
->soc_host
;
1039 soc_host
->drv_name
= "isi-camera";
1040 soc_host
->ops
= &isi_soc_camera_host_ops
;
1041 soc_host
->priv
= isi
;
1042 soc_host
->v4l2_dev
.dev
= &pdev
->dev
;
1043 soc_host
->nr
= pdev
->id
;
1045 ret
= soc_camera_host_register(soc_host
);
1047 dev_err(&pdev
->dev
, "Unable to register soc camera host\n");
1048 goto err_register_soc_camera_host
;
1052 err_register_soc_camera_host
:
1053 free_irq(isi
->irq
, isi
);
1057 vb2_dma_contig_cleanup_ctx(isi
->alloc_ctx
);
1059 dma_free_coherent(&pdev
->dev
,
1060 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
1061 isi
->p_fb_descriptors
,
1062 isi
->fb_descriptors_phys
);
1063 err_alloc_descriptors
:
1065 clk_unprepare(isi
->mck
);
1066 err_clk_prepare_mck
:
1071 clk_unprepare(pclk
);
1072 err_clk_prepare_pclk
:
1078 static struct platform_driver atmel_isi_driver
= {
1079 .remove
= atmel_isi_remove
,
1081 .name
= "atmel_isi",
1082 .owner
= THIS_MODULE
,
1086 module_platform_driver_probe(atmel_isi_driver
, atmel_isi_probe
);
1088 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1089 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1090 MODULE_LICENSE("GPL");
1091 MODULE_SUPPORTED_DEVICE("video");